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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#33665 07/28/2004 2:23 AM | Joined: Aug 2002 Posts: 154 'Bolter | | 'Bolter Joined: Aug 2002 Posts: 154 | Hi all. I have been here listening and learning for about 2 years and working the old 51. I have a quick question. Can anyone tell me the correct part number for for the fan belt when you change over to an alternator? I ordered the brackets and pulley from Chevy Duty and it is the original wide belt. Thanks in advance. | | |
#33666 07/28/2004 5:36 AM | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | There are a few variables that make your question tough to answer. Different pulley sizes and mounting brackets make this a custom fit. Best thing to do is take a piece of rope and wrap it around the pulleys, marking at the overlap. The measure the length of the rope, and take that measurement and the width of the belt to your local parts store. They can fix you up.
Fred
52 3600
69 C-10
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#33667 07/28/2004 6:37 AM | Joined: Mar 2002 Posts: 553 Shop Shark | | Shop Shark Joined: Mar 2002 Posts: 553 | I did the same thing with the rope. Except that I tied a knot in it and took the actual rope to the parts house. He put the rope on his belt sizer to get the proper belt. | | |
#33668 07/29/2004 3:19 AM | Joined: Aug 2000 Posts: 248 'Bolter | | 'Bolter Joined: Aug 2000 Posts: 248 | How do you deal with the different pulley belts size..???
I have a 261 with the small belt size damper pulley.... I shortened the water pump shaft and replace the original 1958 deep dish pump pulley with an after market... Trans Dapt only 2 3/4 deep now the pulleys line up...BUT... the size and profile of the damper pulley is bigger than the Trans Dapt water pump pulley... off hand I would say the original damper oulley is cut for a wide shallow 1/2 inch belt and the pump pulley is cut deep and narrow for something like a 3/8 belt.... will I have a slipping belt?? or will the...if I go back to the deep original pulley I will have to move the rad forward for clearance ....will belt life be affected..? or jump off at high revs...???
Bob C.
Bob C.
CMP Heaven
The Hammond Barn
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